https://i.imgur.com/KlArfiF.png

The moment i click subscribe a 404 error i screenshotted above, (had to record to video and screenshot that, it was happening so fast) then moves onto  https://community.companyofheroes.com/profile/me/rewards like nothing happened. Steam is connected, game is not registering there.

I'm getting a similar problem too. I get an "Error on callback relic steam link. OPENID_NOT_AUTHENTICATE"

I think it's because my Relic account was separate to my Games2Gether account and I don't know how I can claim it. Can only find the link on the relic account but won't let me sync to steam there.

EDIT: I managed to do it using the Edge browser instead of Chrome. I think I have cookies disabled on Chrome as well as other plug-ins so that might have been what was wrong